diff --git a/javascript/diff_match_patch.js b/javascript/diff_match_patch.js
index 56b12cd8..4df161ee 100644
--- a/javascript/diff_match_patch.js
+++ b/javascript/diff_match_patch.js
@@ -1,24 +1,25 @@
-var diff_match_patch=function(){this.Diff_Timeout=1;this.Diff_EditCost=4;this.Match_Threshold=.5;this.Match_Distance=1E3;this.Patch_DeleteThreshold=.5;this.Patch_Margin=4;this.Match_MaxBits=32},DIFF_DELETE=-1,DIFF_INSERT=1,DIFF_EQUAL=0;diff_match_patch.Diff=function(a,b){this[0]=a;this[1]=b};diff_match_patch.Diff.prototype.length=2;diff_match_patch.Diff.prototype.toString=function(){return this[0]+","+this[1]};
+'use strict';var diff_match_patch=function(){this.Diff_Timeout=1;this.Diff_EditCost=4;this.Match_Threshold=.5;this.Match_Distance=1E3;this.Patch_DeleteThreshold=.5;this.Patch_Margin=4;this.Match_MaxBits=32},DIFF_DELETE=-1,DIFF_INSERT=1,DIFF_EQUAL=0;diff_match_patch.Diff=function(a,b){this[0]=a;this[1]=b};diff_match_patch.Diff.prototype.length=2;diff_match_patch.Diff.prototype.toString=function(){return this[0]+","+this[1]};
+diff_match_patch.Diff.prototype[Symbol.iterator]=function*(){yield this[0];yield this[1]};
 diff_match_patch.prototype.diff_main=function(a,b,d,c){"undefined"==typeof c&&(c=0>=this.Diff_Timeout?Number.MAX_VALUE:(new Date).getTime()+1E3*this.Diff_Timeout);if(null==a||null==b)throw Error("Null input. (diff_main)");if(a==b)return a?[new diff_match_patch.Diff(DIFF_EQUAL,a)]:[];"undefined"==typeof d&&(d=!0);var e=d,f=this.diff_commonPrefix(a,b);d=a.substring(0,f);a=a.substring(f);b=b.substring(f);f=this.diff_commonSuffix(a,b);var g=a.substring(a.length-f);a=a.substring(0,a.length-f);b=b.substring(0,
 b.length-f);a=this.diff_compute_(a,b,e,c);d&&a.unshift(new diff_match_patch.Diff(DIFF_EQUAL,d));g&&a.push(new diff_match_patch.Diff(DIFF_EQUAL,g));this.diff_cleanupMerge(a);return a};
 diff_match_patch.prototype.diff_compute_=function(a,b,d,c){if(!a)return[new diff_match_patch.Diff(DIFF_INSERT,b)];if(!b)return[new diff_match_patch.Diff(DIFF_DELETE,a)];var e=a.length>b.length?a:b,f=a.length>b.length?b:a,g=e.indexOf(f);return-1!=g?(d=[new diff_match_patch.Diff(DIFF_INSERT,e.substring(0,g)),new diff_match_patch.Diff(DIFF_EQUAL,f),new diff_match_patch.Diff(DIFF_INSERT,e.substring(g+f.length))],a.length>b.length&&(d[0][0]=d[2][0]=DIFF_DELETE),d):1==f.length?[new diff_match_patch.Diff(DIFF_DELETE,
 a),new diff_match_patch.Diff(DIFF_INSERT,b)]:(e=this.diff_halfMatch_(a,b))?(b=e[1],f=e[3],a=e[4],e=this.diff_main(e[0],e[2],d,c),d=this.diff_main(b,f,d,c),e.concat([new diff_match_patch.Diff(DIFF_EQUAL,a)],d)):d&&100<a.length&&100<b.length?this.diff_lineMode_(a,b,c):this.diff_bisect_(a,b,c)};
 diff_match_patch.prototype.diff_lineMode_=function(a,b,d){var c=this.diff_linesToChars_(a,b);a=c.chars1;b=c.chars2;c=c.lineArray;a=this.diff_main(a,b,!1,d);this.diff_charsToLines_(a,c);this.diff_cleanupSemantic(a);a.push(new diff_match_patch.Diff(DIFF_EQUAL,""));for(var e=c=b=0,f="",g="";b<a.length;){switch(a[b][0]){case DIFF_INSERT:e++;g+=a[b][1];break;case DIFF_DELETE:c++;f+=a[b][1];break;case DIFF_EQUAL:if(1<=c&&1<=e){a.splice(b-c-e,c+e);b=b-c-e;c=this.diff_main(f,g,!1,d);for(e=c.length-1;0<=e;e--)a.splice(b,
 0,c[e]);b+=c.length}c=e=0;g=f=""}b++}a.pop();return a};
-diff_match_patch.prototype.diff_bisect_=function(a,b,d){for(var c=a.length,e=b.length,f=Math.ceil((c+e)/2),g=2*f,h=Array(g),l=Array(g),k=0;k<g;k++)h[k]=-1,l[k]=-1;h[f+1]=0;l[f+1]=0;k=c-e;for(var m=0!=k%2,n=0,w=0,p=0,r=0,u=0;u<f&&!((new Date).getTime()>d);u++){for(var v=-u+n;v<=u-w;v+=2){var q=f+v;var t=v==-u||v!=u&&h[q-1]<h[q+1]?h[q+1]:h[q-1]+1;for(var y=t-v;t<c&&y<e&&a.charAt(t)==b.charAt(y);)t++,y++;h[q]=t;if(t>c)w+=2;else if(y>e)n+=2;else if(m&&(q=f+k-v,0<=q&&q<g&&-1!=l[q])){var x=c-l[q];if(t>=
-x)return this.diff_bisectSplit_(a,b,t,y,d)}}for(v=-u+p;v<=u-r;v+=2){q=f+v;x=v==-u||v!=u&&l[q-1]<l[q+1]?l[q+1]:l[q-1]+1;for(t=x-v;x<c&&t<e&&a.charAt(c-x-1)==b.charAt(e-t-1);)x++,t++;l[q]=x;if(x>c)r+=2;else if(t>e)p+=2;else if(!m&&(q=f+k-v,0<=q&&q<g&&-1!=h[q]&&(t=h[q],y=f+t-q,x=c-x,t>=x)))return this.diff_bisectSplit_(a,b,t,y,d)}}return[new diff_match_patch.Diff(DIFF_DELETE,a),new diff_match_patch.Diff(DIFF_INSERT,b)]};
+diff_match_patch.prototype.diff_bisect_=function(a,b,d){for(var c=a.length,e=b.length,f=Math.ceil((c+e)/2),g=2*f,h=Array(g),l=Array(g),k=0;k<g;k++)h[k]=-1,l[k]=-1;h[f+1]=0;l[f+1]=0;k=c-e;for(var m=0!=k%2,n=0,w=0,v=0,q=0,u=0;u<f&&!((new Date).getTime()>d);u++){for(var t=-u+n;t<=u-w;t+=2){var p=f+t;var r=t==-u||t!=u&&h[p-1]<h[p+1]?h[p+1]:h[p-1]+1;for(var y=r-t;r<c&&y<e&&a.charAt(r)==b.charAt(y);)r++,y++;h[p]=r;if(r>c)w+=2;else if(y>e)n+=2;else if(m&&(p=f+k-t,0<=p&&p<g&&-1!=l[p])){var x=c-l[p];if(r>=
+x)return this.diff_bisectSplit_(a,b,r,y,d)}}for(t=-u+v;t<=u-q;t+=2){p=f+t;x=t==-u||t!=u&&l[p-1]<l[p+1]?l[p+1]:l[p-1]+1;for(r=x-t;x<c&&r<e&&a.charAt(c-x-1)==b.charAt(e-r-1);)x++,r++;l[p]=x;if(x>c)q+=2;else if(r>e)v+=2;else if(!m&&(p=f+k-t,0<=p&&p<g&&-1!=h[p]&&(r=h[p],y=f+r-p,x=c-x,r>=x)))return this.diff_bisectSplit_(a,b,r,y,d)}}return[new diff_match_patch.Diff(DIFF_DELETE,a),new diff_match_patch.Diff(DIFF_INSERT,b)]};
 diff_match_patch.prototype.diff_bisectSplit_=function(a,b,d,c,e){var f=a.substring(0,d),g=b.substring(0,c);a=a.substring(d);b=b.substring(c);f=this.diff_main(f,g,!1,e);e=this.diff_main(a,b,!1,e);return f.concat(e)};
-diff_match_patch.prototype.diff_linesToChars_=function(a,b){function d(l){for(var k="",m=0,n=-1,w=c.length;n<l.length-1;){n=l.indexOf("\n",m);-1==n&&(n=l.length-1);var p=l.substring(m,n+1);(e.hasOwnProperty?e.hasOwnProperty(p):void 0!==e[p])?k+=String.fromCharCode(e[p]):(w==f&&(p=l.substring(m),n=l.length),k+=String.fromCharCode(w),e[p]=w,c[w++]=p);m=n+1}return k}var c=[],e={};c[0]="";var f=4E4,g=d(a);f=65535;var h=d(b);return{chars1:g,chars2:h,lineArray:c}};
+diff_match_patch.prototype.diff_linesToChars_=function(a,b){function d(g){for(var h="",l=0,k=-1,m=c.length;k<g.length-1;){k=g.indexOf("\n",l);-1==k&&(k=g.length-1);var n=g.substring(l,k+1);(e.hasOwnProperty?e.hasOwnProperty(n):void 0!==e[n])?h+=String.fromCharCode(e[n]):(m==f&&(n=g.substring(l),k=g.length),h+=String.fromCharCode(m),e[n]=m,c[m++]=n);l=k+1}return h}var c=[],e={};c[0]="";var f=4E4;a=d(a);f=65535;b=d(b);return{chars1:a,chars2:b,lineArray:c}};
 diff_match_patch.prototype.diff_charsToLines_=function(a,b){for(var d=0;d<a.length;d++){for(var c=a[d][1],e=[],f=0;f<c.length;f++)e[f]=b[c.charCodeAt(f)];a[d][1]=e.join("")}};diff_match_patch.prototype.diff_commonPrefix=function(a,b){if(!a||!b||a.charAt(0)!=b.charAt(0))return 0;for(var d=0,c=Math.min(a.length,b.length),e=c,f=0;d<e;)a.substring(f,e)==b.substring(f,e)?f=d=e:c=e,e=Math.floor((c-d)/2+d);return e};
 diff_match_patch.prototype.diff_commonSuffix=function(a,b){if(!a||!b||a.charAt(a.length-1)!=b.charAt(b.length-1))return 0;for(var d=0,c=Math.min(a.length,b.length),e=c,f=0;d<e;)a.substring(a.length-e,a.length-f)==b.substring(b.length-e,b.length-f)?f=d=e:c=e,e=Math.floor((c-d)/2+d);return e};
 diff_match_patch.prototype.diff_commonOverlap_=function(a,b){var d=a.length,c=b.length;if(0==d||0==c)return 0;d>c?a=a.substring(d-c):d<c&&(b=b.substring(0,d));d=Math.min(d,c);if(a==b)return d;c=0;for(var e=1;;){var f=a.substring(d-e);f=b.indexOf(f);if(-1==f)return c;e+=f;if(0==f||a.substring(d-e)==b.substring(0,e))c=e,e++}};
-diff_match_patch.prototype.diff_halfMatch_=function(a,b){function d(k,m,n){for(var w=k.substring(n,n+Math.floor(k.length/4)),p=-1,r="",u,v,q,t;-1!=(p=m.indexOf(w,p+1));){var y=f.diff_commonPrefix(k.substring(n),m.substring(p)),x=f.diff_commonSuffix(k.substring(0,n),m.substring(0,p));r.length<x+y&&(r=m.substring(p-x,p)+m.substring(p,p+y),u=k.substring(0,n-x),v=k.substring(n+y),q=m.substring(0,p-x),t=m.substring(p+y))}return 2*r.length>=k.length?[u,v,q,t,r]:null}if(0>=this.Diff_Timeout)return null;
-var c=a.length>b.length?a:b,e=a.length>b.length?b:a;if(4>c.length||2*e.length<c.length)return null;var f=this,g=d(c,e,Math.ceil(c.length/4));c=d(c,e,Math.ceil(c.length/2));if(g||c)g=c?g?g[4].length>c[4].length?g:c:c:g;else return null;if(a.length>b.length){c=g[0];e=g[1];var h=g[2];var l=g[3]}else h=g[0],l=g[1],c=g[2],e=g[3];return[c,e,h,l,g[4]]};
+diff_match_patch.prototype.diff_halfMatch_=function(a,b){function d(h,l,k){for(var m=h.substring(k,k+Math.floor(h.length/4)),n=-1,w="",v,q,u,t;-1!=(n=l.indexOf(m,n+1));){var p=f.diff_commonPrefix(h.substring(k),l.substring(n)),r=f.diff_commonSuffix(h.substring(0,k),l.substring(0,n));w.length<r+p&&(w=l.substring(n-r,n)+l.substring(n,n+p),v=h.substring(0,k-r),q=h.substring(k+p),u=l.substring(0,n-r),t=l.substring(n+p))}return 2*w.length>=h.length?[v,q,u,t,w]:null}if(0>=this.Diff_Timeout)return null;
+var c=a.length>b.length?a:b,e=a.length>b.length?b:a;if(4>c.length||2*e.length<c.length)return null;var f=this,g=d(c,e,Math.ceil(c.length/4));c=d(c,e,Math.ceil(c.length/2));if(g||c)g=c?g?g[4].length>c[4].length?g:c:c:g;else return null;a.length>b.length?(a=g[0],b=g[1],c=g[2],e=g[3]):(c=g[0],e=g[1],a=g[2],b=g[3]);return[a,b,c,e,g[4]]};
 diff_match_patch.prototype.diff_cleanupSemantic=function(a){for(var b=!1,d=[],c=0,e=null,f=0,g=0,h=0,l=0,k=0;f<a.length;)a[f][0]==DIFF_EQUAL?(d[c++]=f,g=l,h=k,k=l=0,e=a[f][1]):(a[f][0]==DIFF_INSERT?l+=a[f][1].length:k+=a[f][1].length,e&&e.length<=Math.max(g,h)&&e.length<=Math.max(l,k)&&(a.splice(d[c-1],0,new diff_match_patch.Diff(DIFF_DELETE,e)),a[d[c-1]+1][0]=DIFF_INSERT,c--,c--,f=0<c?d[c-1]:-1,k=l=h=g=0,e=null,b=!0)),f++;b&&this.diff_cleanupMerge(a);this.diff_cleanupSemanticLossless(a);for(f=1;f<
 a.length;){if(a[f-1][0]==DIFF_DELETE&&a[f][0]==DIFF_INSERT){b=a[f-1][1];d=a[f][1];c=this.diff_commonOverlap_(b,d);e=this.diff_commonOverlap_(d,b);if(c>=e){if(c>=b.length/2||c>=d.length/2)a.splice(f,0,new diff_match_patch.Diff(DIFF_EQUAL,d.substring(0,c))),a[f-1][1]=b.substring(0,b.length-c),a[f+1][1]=d.substring(c),f++}else if(e>=b.length/2||e>=d.length/2)a.splice(f,0,new diff_match_patch.Diff(DIFF_EQUAL,b.substring(0,e))),a[f-1][0]=DIFF_INSERT,a[f-1][1]=d.substring(0,d.length-e),a[f+1][0]=DIFF_DELETE,
 a[f+1][1]=b.substring(e),f++;f++}f++}};
-diff_match_patch.prototype.diff_cleanupSemanticLossless=function(a){function b(n,w){if(!n||!w)return 6;var p=n.charAt(n.length-1),r=w.charAt(0),u=p.match(diff_match_patch.nonAlphaNumericRegex_),v=r.match(diff_match_patch.nonAlphaNumericRegex_),q=u&&p.match(diff_match_patch.whitespaceRegex_),t=v&&r.match(diff_match_patch.whitespaceRegex_);p=q&&p.match(diff_match_patch.linebreakRegex_);r=t&&r.match(diff_match_patch.linebreakRegex_);var y=p&&n.match(diff_match_patch.blanklineEndRegex_),x=r&&w.match(diff_match_patch.blanklineStartRegex_);
-return y||x?5:p||r?4:u&&!q&&t?3:q||t?2:u||v?1:0}for(var d=1;d<a.length-1;){if(a[d-1][0]==DIFF_EQUAL&&a[d+1][0]==DIFF_EQUAL){var c=a[d-1][1],e=a[d][1],f=a[d+1][1],g=this.diff_commonSuffix(c,e);if(g){var h=e.substring(e.length-g);c=c.substring(0,c.length-g);e=h+e.substring(0,e.length-g);f=h+f}g=c;h=e;for(var l=f,k=b(c,e)+b(e,f);e.charAt(0)===f.charAt(0);){c+=e.charAt(0);e=e.substring(1)+f.charAt(0);f=f.substring(1);var m=b(c,e)+b(e,f);m>=k&&(k=m,g=c,h=e,l=f)}a[d-1][1]!=g&&(g?a[d-1][1]=g:(a.splice(d-
+diff_match_patch.prototype.diff_cleanupSemanticLossless=function(a){function b(n,w){if(!n||!w)return 6;var v=n.charAt(n.length-1),q=w.charAt(0),u=v.match(diff_match_patch.nonAlphaNumericRegex_),t=q.match(diff_match_patch.nonAlphaNumericRegex_),p=u&&v.match(diff_match_patch.whitespaceRegex_),r=t&&q.match(diff_match_patch.whitespaceRegex_);v=p&&v.match(diff_match_patch.linebreakRegex_);q=r&&q.match(diff_match_patch.linebreakRegex_);n=v&&n.match(diff_match_patch.blanklineEndRegex_);w=q&&w.match(diff_match_patch.blanklineStartRegex_);
+return n||w?5:v||q?4:u&&!p&&r?3:p||r?2:u||t?1:0}for(var d=1;d<a.length-1;){if(a[d-1][0]==DIFF_EQUAL&&a[d+1][0]==DIFF_EQUAL){var c=a[d-1][1],e=a[d][1],f=a[d+1][1],g=this.diff_commonSuffix(c,e);if(g){var h=e.substring(e.length-g);c=c.substring(0,c.length-g);e=h+e.substring(0,e.length-g);f=h+f}g=c;h=e;for(var l=f,k=b(c,e)+b(e,f);e.charAt(0)===f.charAt(0);){c+=e.charAt(0);e=e.substring(1)+f.charAt(0);f=f.substring(1);var m=b(c,e)+b(e,f);m>=k&&(k=m,g=c,h=e,l=f)}a[d-1][1]!=g&&(g?a[d-1][1]=g:(a.splice(d-
 1,1),d--),a[d][1]=h,l?a[d+1][1]=l:(a.splice(d+1,1),d--))}d++}};diff_match_patch.nonAlphaNumericRegex_=/[^a-zA-Z0-9]/;diff_match_patch.whitespaceRegex_=/\s/;diff_match_patch.linebreakRegex_=/[\r\n]/;diff_match_patch.blanklineEndRegex_=/\n\r?\n$/;diff_match_patch.blanklineStartRegex_=/^\r?\n\r?\n/;
 diff_match_patch.prototype.diff_cleanupEfficiency=function(a){for(var b=!1,d=[],c=0,e=null,f=0,g=!1,h=!1,l=!1,k=!1;f<a.length;)a[f][0]==DIFF_EQUAL?(a[f][1].length<this.Diff_EditCost&&(l||k)?(d[c++]=f,g=l,h=k,e=a[f][1]):(c=0,e=null),l=k=!1):(a[f][0]==DIFF_DELETE?k=!0:l=!0,e&&(g&&h&&l&&k||e.length<this.Diff_EditCost/2&&3==g+h+l+k)&&(a.splice(d[c-1],0,new diff_match_patch.Diff(DIFF_DELETE,e)),a[d[c-1]+1][0]=DIFF_INSERT,c--,e=null,g&&h?(l=k=!0,c=0):(c--,f=0<c?d[c-1]:-1,l=k=!1),b=!0)),f++;b&&this.diff_cleanupMerge(a)};
 diff_match_patch.prototype.diff_cleanupMerge=function(a){a.push(new diff_match_patch.Diff(DIFF_EQUAL,""));for(var b=0,d=0,c=0,e="",f="",g;b<a.length;)switch(a[b][0]){case DIFF_INSERT:c++;f+=a[b][1];b++;break;case DIFF_DELETE:d++;e+=a[b][1];b++;break;case DIFF_EQUAL:1<d+c?(0!==d&&0!==c&&(g=this.diff_commonPrefix(f,e),0!==g&&(0<b-d-c&&a[b-d-c-1][0]==DIFF_EQUAL?a[b-d-c-1][1]+=f.substring(0,g):(a.splice(0,0,new diff_match_patch.Diff(DIFF_EQUAL,f.substring(0,g))),b++),f=f.substring(g),e=e.substring(g)),
@@ -34,13 +35,13 @@ diff_match_patch.prototype.diff_prettyHtml=function(a){a=this.diff_cleanupSplitS
 diff_match_patch.prototype.diff_text1=function(a){for(var b=[],d=0;d<a.length;d++)a[d][0]!==DIFF_INSERT&&(b[d]=a[d][1]);return b.join("")};diff_match_patch.prototype.diff_text2=function(a){for(var b=[],d=0;d<a.length;d++)a[d][0]!==DIFF_DELETE&&(b[d]=a[d][1]);return b.join("")};
 diff_match_patch.prototype.diff_levenshtein=function(a){for(var b=0,d=0,c=0,e=0;e<a.length;e++){var f=a[e][1];switch(a[e][0]){case DIFF_INSERT:d+=f.length;break;case DIFF_DELETE:c+=f.length;break;case DIFF_EQUAL:b+=Math.max(d,c),c=d=0}}return b+=Math.max(d,c)};
 diff_match_patch.prototype.diff_toDelta=function(a){a=this.diff_cleanupSplitSurrogates(a);for(var b=[],d=0;d<a.length;d++)switch(a[d][0]){case DIFF_INSERT:b[d]="+"+encodeURI(a[d][1]);break;case DIFF_DELETE:b[d]="-"+a[d][1].length;break;case DIFF_EQUAL:b[d]="="+a[d][1].length}return b.join("\t").replace(/%20/g," ")};
-diff_match_patch.prototype.diff_fromDelta=function(a,b){for(var d=[],c=0,e=0,f=b.split(/\t/g),g=0;g<f.length;g++){var h=f[g].substring(1);switch(f[g].charAt(0)){case "+":try{d[c++]=new diff_match_patch.Diff(DIFF_INSERT,this.decodeURI(h))}catch(k){throw Error("Illegal escape in diff_fromDelta: "+h);}break;case "-":case "=":var l=parseInt(h,10);if(isNaN(l)||0>l)throw Error("Invalid number in diff_fromDelta: "+h);h=a.substring(e,e+=l);"="==f[g].charAt(0)?d[c++]=new diff_match_patch.Diff(DIFF_EQUAL,h):
-d[c++]=new diff_match_patch.Diff(DIFF_DELETE,h);break;default:if(f[g])throw Error("Invalid diff operation in diff_fromDelta: "+f[g]);}}if(e!=a.length)throw Error("Delta length ("+e+") does not equal source text length ("+a.length+").");return d};diff_match_patch.prototype.match_main=function(a,b,d){if(null==a||null==b||null==d)throw Error("Null input. (match_main)");d=Math.max(0,Math.min(d,a.length));return a==b?0:a.length?a.substring(d,d+b.length)==b?d:this.match_bitap_(a,b,d):-1};
-diff_match_patch.prototype.match_bitap_=function(a,b,d){function c(v,q){var t=v/b.length,y=Math.abs(d-q);return f.Match_Distance?t+y/f.Match_Distance:y?1:t}if(b.length>this.Match_MaxBits)throw Error("Pattern too long for this browser.");var e=this.match_alphabet_(b),f=this,g=this.Match_Threshold,h=a.indexOf(b,d);-1!=h&&(g=Math.min(c(0,h),g),h=a.lastIndexOf(b,d+b.length),-1!=h&&(g=Math.min(c(0,h),g)));var l=1<<b.length-1;h=-1;for(var k,m,n=b.length+a.length,w,p=0;p<b.length;p++){k=0;for(m=n;k<m;)c(p,
-d+m)<=g?k=m:n=m,m=Math.floor((n-k)/2+k);n=m;k=Math.max(1,d-m+1);var r=Math.min(d+m,a.length)+b.length;m=Array(r+2);for(m[r+1]=(1<<p)-1;r>=k;r--){var u=e[a.charAt(r-1)];m[r]=0===p?(m[r+1]<<1|1)&u:(m[r+1]<<1|1)&u|(w[r+1]|w[r])<<1|1|w[r+1];if(m[r]&l&&(u=c(p,r-1),u<=g))if(g=u,h=r-1,h>d)k=Math.max(1,2*d-h);else break}if(c(p+1,d)>g)break;w=m}return h};
+diff_match_patch.prototype.diff_fromDelta=function(a,b){var d=[],c=0,e=0;b=b.split(/\t/g);for(var f=0;f<b.length;f++){var g=b[f].substring(1);switch(b[f].charAt(0)){case "+":try{d[c++]=new diff_match_patch.Diff(DIFF_INSERT,this.decodeURI(g))}catch(l){throw Error("Illegal escape in diff_fromDelta: "+g);}break;case "-":case "=":var h=parseInt(g,10);if(isNaN(h)||0>h)throw Error("Invalid number in diff_fromDelta: "+g);g=a.substring(e,e+=h);"="==b[f].charAt(0)?d[c++]=new diff_match_patch.Diff(DIFF_EQUAL,
+g):d[c++]=new diff_match_patch.Diff(DIFF_DELETE,g);break;default:if(b[f])throw Error("Invalid diff operation in diff_fromDelta: "+b[f]);}}if(e!=a.length)throw Error("Delta length ("+e+") does not equal source text length ("+a.length+").");return d};diff_match_patch.prototype.match_main=function(a,b,d){if(null==a||null==b||null==d)throw Error("Null input. (match_main)");d=Math.max(0,Math.min(d,a.length));return a==b?0:a.length?a.substring(d,d+b.length)==b?d:this.match_bitap_(a,b,d):-1};
+diff_match_patch.prototype.match_bitap_=function(a,b,d){function c(t,p){t/=b.length;p=Math.abs(d-p);return f.Match_Distance?t+p/f.Match_Distance:p?1:t}if(b.length>this.Match_MaxBits)throw Error("Pattern too long for this browser.");var e=this.match_alphabet_(b),f=this,g=this.Match_Threshold,h=a.indexOf(b,d);-1!=h&&(g=Math.min(c(0,h),g),h=a.lastIndexOf(b,d+b.length),-1!=h&&(g=Math.min(c(0,h),g)));var l=1<<b.length-1;h=-1;for(var k,m,n=b.length+a.length,w,v=0;v<b.length;v++){k=0;for(m=n;k<m;)c(v,d+
+m)<=g?k=m:n=m,m=Math.floor((n-k)/2+k);n=m;k=Math.max(1,d-m+1);var q=Math.min(d+m,a.length)+b.length;m=Array(q+2);for(m[q+1]=(1<<v)-1;q>=k;q--){var u=e[a.charAt(q-1)];m[q]=0===v?(m[q+1]<<1|1)&u:(m[q+1]<<1|1)&u|(w[q+1]|w[q])<<1|1|w[q+1];if(m[q]&l&&(u=c(v,q-1),u<=g))if(g=u,h=q-1,h>d)k=Math.max(1,2*d-h);else break}if(c(v+1,d)>g)break;w=m}return h};
 diff_match_patch.prototype.match_alphabet_=function(a){for(var b={},d=0;d<a.length;d++)b[a.charAt(d)]=0;for(d=0;d<a.length;d++)b[a.charAt(d)]|=1<<a.length-d-1;return b};
 diff_match_patch.prototype.patch_addContext_=function(a,b){if(0!=b.length){if(null===a.start2)throw Error("patch not initialized");for(var d=b.substring(a.start2,a.start2+a.length1),c=0;b.indexOf(d)!=b.lastIndexOf(d)&&d.length<this.Match_MaxBits-this.Patch_Margin-this.Patch_Margin;)c+=this.Patch_Margin,d=b.substring(a.start2-c,a.start2+a.length1+c);c+=this.Patch_Margin;0<a.start2-c&&diff_match_patch.prototype.isLowSurrogate(b[a.start2-c])&&c++;(d=b.substring(a.start2-c,a.start2))&&a.diffs.unshift(new diff_match_patch.Diff(DIFF_EQUAL,
-d));a.start2+a.length1+c<b.length&&diff_match_patch.prototype.isHighSurrogate(b[a.start2+a.length1+c])&&c++;(c=b.substring(a.start2+a.length1,a.start2+a.length1+c))&&a.diffs.push(new diff_match_patch.Diff(DIFF_EQUAL,c));a.start1-=d.length;a.start2-=d.length;a.length1+=d.length+c.length;a.length2+=d.length+c.length}};
+d));a.start2+a.length1+c<b.length&&diff_match_patch.prototype.isHighSurrogate(b[a.start2+a.length1+c])&&c++;(b=b.substring(a.start2+a.length1,a.start2+a.length1+c))&&a.diffs.push(new diff_match_patch.Diff(DIFF_EQUAL,b));a.start1-=d.length;a.start2-=d.length;a.length1+=d.length+b.length;a.length2+=d.length+b.length}};
 diff_match_patch.prototype.patch_make=function(a,b,d){if("string"==typeof a&&"string"==typeof b&&"undefined"==typeof d){var c=a;b=this.diff_main(c,b,!0);2<b.length&&(this.diff_cleanupSemantic(b),this.diff_cleanupEfficiency(b))}else if(a&&"object"==typeof a&&"undefined"==typeof b&&"undefined"==typeof d)b=a,c=this.diff_text1(b);else if("string"==typeof a&&b&&"object"==typeof b&&"undefined"==typeof d)c=a;else if("string"==typeof a&&"string"==typeof b&&d&&"object"==typeof d)c=a,b=d;else throw Error("Unknown call format to patch_make.");
 if(0===b.length)return[];b=this.diff_cleanupSplitSurrogates(b);d=[];a=new diff_match_patch.patch_obj;for(var e=0,f=0,g=0,h=c,l=0;l<b.length;l++){var k=b[l][0],m=b[l][1];e||k===DIFF_EQUAL||(a.start1=f,a.start2=g);switch(k){case DIFF_INSERT:a.diffs[e++]=b[l];a.length2+=m.length;c=c.substring(0,g)+m+c.substring(g);break;case DIFF_DELETE:a.length1+=m.length;a.diffs[e++]=b[l];c=c.substring(0,g)+c.substring(g+m.length);break;case DIFF_EQUAL:m.length<=2*this.Patch_Margin&&e&&b.length!=l+1?(a.diffs[e++]=
 b[l],a.length1+=m.length,a.length2+=m.length):m.length>=2*this.Patch_Margin&&e&&(this.patch_addContext_(a,h),d.push(a),a=new diff_match_patch.patch_obj,e=0,h=c,f=g)}k!==DIFF_INSERT&&(f+=m.length);k!==DIFF_DELETE&&(g+=m.length)}e&&(this.patch_addContext_(a,h),d.push(a));return d};
diff --git a/javascript/diff_match_patch_uncompressed.js b/javascript/diff_match_patch_uncompressed.js
index a9b41d66..a5110979 100644
--- a/javascript/diff_match_patch_uncompressed.js
+++ b/javascript/diff_match_patch_uncompressed.js
@@ -88,6 +88,21 @@ diff_match_patch.Diff.prototype.toString = function() {
   return this[0] + ',' + this[1];
 };
 
+/**
+ * Provide an iterable instance on a Diff object.
+ * 
+ * While it's not intended that the Diff be iterated,
+ * this instance is useful for destructuring assignment.
+ * 
+ * Example:
+ * 
+ *     const diff = new diff_match_patch.Diff(DIFF_EQUAL, 'hello');
+ *     const [op, text] = diff;
+ */
+diff_match_patch.Diff.prototype[Symbol.iterator] = function*() {
+  yield this[0];
+  yield this[1];
+}
 
 /**
  * Find the differences between two texts.  Simplifies the problem by stripping
diff --git a/javascript/tests/diff_match_patch_test.html b/javascript/tests/diff_match_patch_test.html
index 46617309..14233e09 100644
--- a/javascript/tests/diff_match_patch_test.html
+++ b/javascript/tests/diff_match_patch_test.html
@@ -88,6 +88,7 @@
       }
 
       var tests = [
+          'testDiffIsDestructurable',
           'testDiffCommonPrefix',
           'testDiffCommonSuffix',
           'testDiffCommonOverlap',
diff --git a/javascript/tests/diff_match_patch_test.js b/javascript/tests/diff_match_patch_test.js
index 99aaca13..4f8cb93a 100644
--- a/javascript/tests/diff_match_patch_test.js
+++ b/javascript/tests/diff_match_patch_test.js
@@ -76,6 +76,17 @@ function diff_rebuildtexts(diffs) {
 var dmp = new diff_match_patch();
 
 
+// Diff object TEST FUNCTIONS
+
+function testDiffIsDestructurable() {
+  const diff = new diff_match_patch.Diff(dmp.DIFF_EQUAL, 'six one way half a dozen another');
+  const [op, text] = diff;
+
+  assertEquals(diff[0], op);
+  assertEquals(diff[1], text);
+}
+
+
 // DIFF TEST FUNCTIONS